The Best Free Guitar Tuner Apps for iPhone (Tested)

A guitar tuner is the most important app in any guitarist's phone. It also has, somehow, the worst app-store landscape in music — bloated free apps stuffed with intrusive ads, paywalls on basic features, and an endless parade of "free" tuners that demand a subscription before they'll show you a needle.

This is a tested comparison of the actually-free, actually-usable tuner apps for iPhone in 2026. Same testing protocol on each: standard tuning, drop D, alternate tunings, accuracy at low pitch, mic sensitivity in a quiet room and a noisy one.

What "free" should actually mean

For a tuner to count as honestly free, it should:

• ·Tune all six standard guitar strings without a paywall
• ·Work in alternate tunings without paying
• ·Not interrupt tuning with full-screen ads
• ·Not require an account or signup
• ·Not push you to a subscription within the first 60 seconds
• ·Detect chromatically (any pitch) so you can use it for non-guitar instruments too

Most "free" tuners fail at least two of these. The ones below pass.

GuitarTuna — the default everyone tries first

Verdict: solid free tier, aggressive paywall on extras.

The accuracy is excellent. The needle is responsive and tuning standard tuning is fast and obvious. It also has a chord library, songbook, and learning features — most behind a paywall.

The pure tuner is genuinely free. Alternate tunings are free up to a limit. The premium nag is constant but not blocking.

Best for: anyone who wants a no-think tuner and is willing to ignore upsells.

Fender Tune — clean, made by people who make guitars

Verdict: cleanest UX, narrowest feature set.

Fender's tuner is simple and beautiful. The interface is the clearest of any tuner I tested. Fewer features than GuitarTuna but the ones it has work flawlessly.

Best for: beginners who want a tuner that doesn't feel like a freemium trap. Aesthetics over feature depth.

Larka's built-in chromatic tuner

Verdict: not the standalone tuner everyone's heard of, but it's actually free, accurate, and integrated into a music app.

The Tools tab in Larka has a chromatic tuner built on autocorrelation pitch detection — the same technique used by professional tuners. It tunes any instrument, any string, any pitch, in standard or alternate tuning, with no paywall, no ads, no signup.

Best for: musicians who already want the rest of Larka (recording, chord detection, AI generation, metronome) and don't want to install a second app for tuning. The tuner is 100% free forever — it's in the "core tools, always free" tier we never paywall.

Cleartune — the indie classic

Verdict: cult favorite, paid only ($4 one-time).

Included for completeness even though it's not free. Cleartune has a loyal following because it does *only* tuning and does it perfectly. No ads, no upsells, no nonsense. One-time purchase, no subscription.

Best for: musicians who hate freemium apps and would rather pay $4 once than see another upgrade prompt.

BOSS Tuner — pro-grade for free

Verdict: surprisingly excellent, surprisingly free.

Made by the pedal company. Mimics the look of a stage tuner pedal, with chromatic mode and reference-pitch adjustment. No ads on the iOS version (unusual for a free tuner from a hardware brand).

Best for: gigging musicians who want a stage-tuner aesthetic and don't need extras.

Apps to skip

Several "free" tuners in the App Store are actively user-hostile:

• ·Tuners that trigger a 30-second video ad before each tuning
• ·Tuners that lock alternate tunings behind subscriptions despite "free" billing
• ·Tuners that require email signup before opening
• ·"All-in-one music apps" where the tuner is just a hook to sell other features

The red flag is usually any tuner with more than 15,000 reviews and a 3-star average — the rating drag is from the freemium friction, not the tuner accuracy.

Bonus: tuning a non-guitar instrument

Most "guitar tuners" are actually chromatic — they detect any pitch, not just guitar pitches. So you can use them for ukulele, bass, mandolin, violin, even your singing voice (helpful for finding your range).

The trick: switch the app from "guitar mode" (which highlights only the six standard guitar pitches) to "chromatic mode" (which displays whatever note it hears). Most apps support both. Larka's tuner is chromatic by default.

Quick recommendation

Need just a tuner, want it now, don't care about ads: Fender Tune. Cleanest free option.

Want zero freemium friction and will pay $4: Cleartune.

**Want a tuner *plus* recording, chord detection, songwriting tools, AI generation:** Larka. The tuner is a small part of the app but it's as accurate as the standalone options.

Want a tuner pedal aesthetic: BOSS Tuner. Free, no nonsense.